Add an unpatched version of xz, XZ Utils, to /trunk/deps/third_party

xz/src/liblzma/common/vli_size.c

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       vli_size.c
+/// \brief      Calculates the encoded size of a variable-length integer
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+extern LZMA_API(uint32_t)
+lzma_vli_size(lzma_vli vli)
+{
+        if (vli > LZMA_VLI_MAX)
+                return 0;
+
+        uint32_t i = 0;
+        do {
+                vli >>= 7;
+                ++i;
+        } while (vli != 0);
+
+        assert(i <= LZMA_VLI_BYTES_MAX);
+        return i;
+}